Something went wrong while Post Processing the assembly: System.Collections.Generic.Queue

[daschatten]

I upgraded my project to 2019.3.0f4 with latest packages and now the error below happens frequently. There are two versions of this error, one about Queue and one about Stack. I can get rid of it (for a short time) by switching from Net4.x to 2.0 and back, then hit save. It recompiles a long time then it’s gone for a moment.

Unity 2019.3.0f4

“com.unity.burst”: “1.2.0-preview.11”,
“com.unity.entities”: “0.4.0-preview.10”,
“com.unity.mathematics”: “1.1.0”,
“com.unity.netcode”: “0.0.4-preview.0”,
“com.unity.physics”: “0.2.5-preview.1”,

Any idea?

Something went wrong while Post Processing the assembly (Assembly-CSharp.dll) :
Failed to resolve System.Collections.Generic.Queue1 at Unity.Entities.CodeGen.TypeReferenceExtensions.CheckedResolve (Mono.Cecil.TypeReference typeReference) [0x00001] in E:\Unity Projects\My Game\Library\PackageCache\com.unity.entities@0.4.0-preview.10\Unity.Entities.CodeGen\CecilExtensionMethods.cs:13 at Unity.Entities.CodeGen.BlobAssetSafetyVerifier.<VerifyMethod>g__IsTypeRestrictedToBlobAssetStorage|3_0 (Mono.Cecil.TypeReference tr, Unity.Entities.CodeGen.BlobAssetSafetyVerifier+<>c__DisplayClass3_0& ) [0x000f0] in E:\Unity Projects\My Game\Library\PackageCache\com.unity.entities@0.4.0-preview.10\Unity.Entities.CodeGen\BlobAssetSafety\BlobAssetSafetyVerifier.cs:64 at Unity.Entities.CodeGen.BlobAssetSafetyVerifier.VerifyMethod (Mono.Cecil.MethodDefinition method, System.Collections.Generic.HashSet1[T] _nonRestrictedTypes) [0x00058] in E:\Unity Projects\My Game\Library\PackageCache\com.unity.entities@0.4.0-preview.10\Unity.Entities.CodeGen\BlobAssetSafety\BlobAssetSafetyVerifier.cs:90
at Unity.Entities.CodeGen.BlobAssetSafetyVerifier.AssertNoBlobAssetLeavesBlobAssetStorage () [0x00063] in E:\Unity Projects\My Game\Library\PackageCache\com.unity.entities@0.4.0-preview.10\Unity.Entities.CodeGen\BlobAssetSafety\BlobAssetSafetyVerifier.cs:37
at Unity.Entities.CodeGen.BlobAssetSafetyVerifier.PostProcessImpl () [0x0000a] in E:\Unity Projects\My Game\Library\PackageCache\com.unity.entities@0.4.0-preview.10\Unity.Entities.CodeGen\BlobAssetSafety\BlobAssetSafetyVerifier.cs:20
at Unity.Entities.CodeGen.EntitiesILPostProcessor.PostProcess (Mono.Cecil.AssemblyDefinition assemblyDefinition, System.Boolean& madeAChange) [0x00009] in E:\Unity Projects\My Game\Library\PackageCache\com.unity.entities@0.4.0-preview.10\Unity.Entities.CodeGen\EntitiesILPostProcessor.cs:231
at Unity.Entities.CodeGen.EntitiesILPostProcessors.Process (Unity.CompilationPipeline.Common.ILPostProcessing.ICompiledAssembly compiledAssembly) [0x0004b] in E:\Unity Projects\My Game\Library\PackageCache\com.unity.entities@0.4.0-preview.10\Unity.Entities.CodeGen\EntitiesILPostProcessor.cs:44
at UnityEditor.Scripting.ScriptCompilation.ILPostProcessing.RunILPostProcessors (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly assembly, System.String outputTempPath) [0x0011b] in :0
at UnityEditor.Scripting.ScriptCompilation.ILPostProcessing.PostProcess (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly assembly, System.Collections.Generic.List`1[T] messages, System.String outputTempPath) [0x00061] in :0

[daschatten]

Seems to be fixed by the solution Joachim provided in Latest Entites and InputSystems packages conflict.